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针对TD-SCDMA 系统,在Music 算法的基础上,给出一个改进的移动用户定位方法。利用空间平滑预处理方法得到前、后向平均空间平滑协方差矩阵,再取平均得到所需的空间平滑协方差矩阵,利用该矩阵作为Music 算法的输入,进行DOA 估计。利用TD-SCDMA 的上行同步,计算出UE 到基站的时间,从而得到二者间的距离,最后由UE 的方位角和到基站的距离,估计出UE的位置。
For TD-SCDMA system, based on the Music algorithm, an improved mobile user location method is given. The spatial smoothing covariance matrix is obtained by using the spatial smoothing preprocessing method, and then the required spatial smoothing covariance matrix is obtained by averaging. The matrix is used as the input of the Music algorithm for DOA estimation. The uplink synchronization of TD-SCDMA is used to calculate the time from the UE to the base station to obtain the distance between the two. Finally, the position of the UE is estimated from the azimuth of the UE and the distance from the base station.